Implement borders

The borders are implemented as a surface/buffer attached to each view
which is sent to and rendered by wlc in the view_pre_render callback.

All the drawing logic is handled in sway/border.c and all the logic for
calculating the geometry of the border/view is handled in
`update_geometry` in sway/layout.c (same place as gaps are calculated).

1 files changed, 1 insertions, 0 deletions

diff --git a/include/config.h b/include/config.h
index a35cfd0a..fb84423c 100644
--- a/include/config.h
+++ b/include/config.h
@@ -184,6 +184,7 @@ struct sway_config {
         enum swayc_layouts default_orientation;
         enum swayc_layouts default_layout;
         char *font;
+        int font_height;
 
         // Flags
         bool focus_follows_mouse;